Franz caztn



(No Model.)

` F. GAZIN.

i GRUSHING ROLLS. No. 558,391. Patented Jan. 21,'1898.

UNITED STATES PATENT OFFICE. i

FRANZ CAZIN, OF DENVER, COLORADO, ASSIGNOR TO THE COLORADO IRON VVORKS,OF SAME PLACE.

CRUSHING-ROLLS.

SPECIFICATION forrning part of Letters Patent No. 553,391, dated January21, 1896.

Application file August 16, 1895. Serial No. 559,513. (No model.)

To all whom it may oonccrn:

Be it known that I, FRANZ CAZIN, a citizen of the United States,residing at Denver, in the county of Arapahoe and State of Colorado,have invented certain new and useful Improvements in CruShing-Rolls, ofwhich the following is a Specification,reference being had therein tothe accompanying drawings.

My invention relates to improved crushingrolls, and it is my object toprovide avery i simple arrangement for applying tension to shows thetrunnion-box and frame together with the frame in section.

In the drawings the rolls are shown at A A', which are driven by powerapplied to one or both of their Shafts and revolving as shown by thearrows. These rolls are carried by axles B, which turn in trunnion-boXesO. These boxes, as shown in Figs. 3 and 4, have pivots 'n projectingfrom the top and bottom and lugs o projecting from each side at rightangles to the pivots, and these trunnionboXeS are fitted to frames cl,made of two parts bolted together, as shown in Figs 5, 6 and 7. Theseframes have pockets n' forthe reception of the pivots n of thetrunnion-boxes and enlarged pockets o' for the reception of the lugs 0.The pockets o' are curved in cross-Section and allow a pivotal movementof the trunnion-box on its pivots in a horizontal direction. The framesd are grooved at top and bottom on the outer side and are fitted to beplaced between the side bars e of the main frame. These grooves e' ofthe frames d Serve to prevent displacement from the main frame.

AS shown in Figs. 1 and 2, the side bars c on each Side extend beyondthe frame proper and are connected by a plate g, this plate beingprevented from displacement by nuts 82. These 'plates g form the backrest of a nest of Springs h, which are held between said plate g and asecond plate j, with a third plate interposed between independentSprings of the nest. End rods 70 extend between the plates g and j,having heads on one end and nuts on the other. These rods Serve tosupport the plates and confine them against spreading movement, but donot interfere with the inward movement of Said plates. The Springs aresuitably compressed before introduction between the plates, and thepressure of these Springs is exerted against the rolls through a Screwm, one being provided for each set of Springs and bearing centrallyagainst the nearest frame d, carrying the trunnion-box. A nut Z on theserew m is seated against the plate j, and the pressure may be increasedor diminished by Screwing up or unscrewing the Screw m.

It will be seen that the rolls after having been adjusted will keep thesame distance apart until a piece passes between them too strong to bebroken when the Springs will be compressed and the rolls will openSufficiently to let the piece through. If this piece happenS to be nearone end of the rolls the Springs on that Side only will be compressed,and in this event only the trunnion-box at one end will be moved or willbe moved to a greater extent than the box on 'the opposite Side. Byreason of the free hor'izontal movement permitted the trunnion-box allcramping of the parts is prevented and there is no danger of Strainingor rupturing the parts.

I do not limit myself to the exact construction of the trunnion-box andits frame, as I may provide a universal connection, if desired, though Iprefer the construction shown.

What I claiin is- 1. In combination, the supporting frame, the pair oftrunnion box frames having free horizontal sliding movement and the pairof trunnion boXeS pivoted within Said frame and having Swinging movementin the Same direction as said frame and the roller jour- 'naled in Saidboxes, Substantially as described.

2. In combination, with a pair of rolls and with the axles thereof, atrunnion box frame IOO made in two parts and a trunnion box havingpivots entering" reeesses in the frame and lugs entering other recessesin said frame, substantially as deseribed.

3. In combination, the pair of rolls, the sliding trunnion frame, theside bars, the backing plate secured to the end of said bars, the platej sliding on said bar, the intermediate plate the nest of Springsinterposed between the plate and the backing plate, and the serew rodunder the tension of said Springs adapted to bear on said trunnionframe, and the connection between said rod and the Springs Whereby thetension on said rod can be increased or diminished, substantially as r 5deseribed.

In testimony whereof I affix my signature in presence of two witnesses.

i FRAN Z OAZIN. Wtnesses:

J. H. HAMMOND, S. H. NESMITH.

